customizing about window in a standalone with maxinterface.json

I’ve successfully customized the menu of my standalone with the maxinterface.json file (Contents/support/interfaces)
There’s plenty of things but for a mac standalone everything is after the "menus_runtime_mac".

It seems that there is something you can’t change in this file it’s the ‘about window’. I managed to change the text ‘about …’ but not the window.

Does anyone know if I have to use the menubar object for customizing the about window of my standalone